无线充电系统负载功率特性研究  

Research on load power characteristics of wireless charging system

作　　者：贺养养 雷鸣[1] 付永升[1] 李健 He Yangyang;Lei Ming;Fu Yongsheng;Li Jian(College of Electronic Information Engineering, Xi＇an Technological University, Xi＇an 710021, China)

机构地区：[1]西安工业大学电子信息工程学院

出　　处：《国外电子测量技术》2018年第2期21-24,共4页Foreign Electronic Measurement Technology

基　　金：陕西省科技厅工业攻关(2016GY-126)资助项目

摘　　要：目前,磁耦合谐振式无线充电技术应用前景较好,这种方法与感应式无线充电技术相比,它具有高效率、安全性高以及中远距离传输等优势,有非常髙的研究价值和巨大的发展空间。但是磁耦合谐振式无线电能传输技术的传输效率、传输功率、谐振频率、系统参数的优化设计,以及阻抗匹配、功效同步等问题仍然是制约此项技术广泛推广应用的关键所在。在实际传输系统中,发送与接收线圈会发生偏移,互感会发生改变,从而导致系统功率下降。利用DC/DC变换器改变负载值,达到匹配效果。即通过改变DC/DC变换器的占空比D,使得系统在较大范围内,处于最优功率工作状态。At present,the magnetic coupling resonant wireless charging technology has a good prospect of application.Compared with the inductive wireless charging technology,this method has the advantages of high effici-ency,high security,and long-distance transm-ission,and has great research value and huge expansion capacity.However,the issues of transmission efficiency,transmission power,resonant frequency,optimal design of system parameters,impedance matching and power efficiency of the magnetically coupled resona-nt wireless power transmission technology are still the key factors restricting the widespread application of this technology.In the actual transmission system,the sending and receiv-ing coils will be offset,mutual inductance will change,resulting in system power down.In this paper,DC/DC converter to change the load value,to achieve the matching effect.That is to say,by changing the duty ratio Dof the DC/DC converter,the system is in the optimal power working state in a wide range.

关 键 词：无线充电 磁共振耦合 输出功率 DC/DC转换器 

分 类 号：TN98[电子电信—信息与通信工程]